ALLEN PARK The Lions have acquired safety Ko Simpson from the Buffalo Bills in exchange for an undisclosed 2010 draft choice. The trade is pending Simpson passing a physical. Simpson, who is 6-foot-1 and 202 pounds, spent three seasons with the Bills. He has appeared in 33 career games with 27 starts. Last season he played in all 16 games and finished with 64 tackles.
The Lions released defensive end Orion Martin.